Tubular lock with an adjustable device for two-size setting

Abstract

This tubular lock has a device that can adjust its size into two kinds for fixing on a door. The device utilizes the movement of an extending plate and an auxiliary plate, changing their positions to either of the two sizes, but the lock still works in spite of the size change.

What is claimed is: 
     
       1. A tubular lock with an adjustable device for fixing the lock in two different sizes comprising, a lock cylinder having a faceplate, a fixing plate and a cylinder which contains inside an anti-burglar set and has a bottom cut with a hole for combining with a combining set,   a combining set comprising an outer U-shaped combining plate having two position holes, a hole between said position holes, bent upper and lower sides and a stopping key at each end of the upper and lower sides, and a lid plate which has two position holes and a hole between said position holes as said outer combining plate does, two inward protrusion means to stop the movement of an auxiliary extending plate, and hook means to hook against one end of the hole in said cylinder,   a moving set comprising a moving plate, an extending plate and an auxiliary extending plate which are all combined between said outer combining plate and said lid plate, said moving plate having a neck means to combine with a dead bolt, one set of tooth means to be moved by an arc-shaped plate of a knob, and another set of tooth means to be leaned against by two bent protrusions of said extending plate; said extending plate having two protrusion means to lean against a set of tooth means of said moving plate, a hole means to be moved by said arc-shaped plate, and a pin means to insert in and move along a guiding hole of said auxiliary extending plate; said auxiliary extending plate having said guiding hole for said pin means of said extending plate to move inside and to be stopped at its end when a hole of said auxiliary extending plate is located just against a hole of said extending plate, a round hole means for a bolt of the knob to be inserted in, a wall means to move along on two stopping keys and to be stopped at a certain point when retracting, and shoulder means to be stopped by two inward protrusions of said lid plate when moving inward,   an anti-burglar set comprising a dead bolt, and anti-burglar bolt, a stopping plate and two coil springs, and having characteristic that inward movement of said auxiliary extending plate can adjust the lock to the short size, activating one hole means of said extending plate to locate against one set of the tooth means of said moving plate so that the arc-shaped plate can fit in and move said hole means of said extending plate and said tooth means of said moving plate, and that outward pulling of said auxiliary extending plate can adjust the lock to the long size, activating said protrusion means of said extending plate to lean against another set of tooth means of said moving plate so that said arc-shaped plate can move said extending plate and then said moving plate.   
     
     
       2. The tubular lock as claimed in claim 1, wherein said outer combining plate has an inward stopping key at each end of the upper and lower sides. 
     
     
       3. The tubular lock as claimed in claim 1, wherein said lid plate has two inward protrusion means to restrict the inward movement of said auxiliary extending plate. 
     
     
       4. The tubular lock as claimed in claim 1, wherein one set of the tooth means on the moving plate is provided with a straight groove at its front for said protrusion means of said extending plate to lean against after moving on said groove. 
     
     
       5. The tubular lock as claimed in claim 1, wherein said extending plate has a hole to be moved by said arc-shaped plate of the knob, two bent protrusions to lean against one set of said tooth means of said moving plate, and a pin means to move in said guiding hole of said auxiliary extending plate. 
     
     
       6. The tubular lock as claimed in claim 1, wherein said auxiliary extending plate has a round hole which comes to locate just against the position holes of said combining set when said plate is pulled outward.